Cook's Blue
Farrow & Ball
Try 237 on your wall
Take a photo of the room. Muro puts this color on the walls in the light the room actually has.
Download on App StoreOpen in browseriPhone, iPad and browser · a screen cannot replace a sample on the wall
How Cook's Blue behaves on a wall
Farrow & Ball publishes a light reflectance value of 54.3 for this shade. At LRV 54.3 this is a light shade that still carries colour rather than reading as off-white. It gives back most of the light in the room, which suits north-facing walls that need the help. For trim that reads as a clear edge rather than a smudge, aim about 30 LRV points away in either direction — under LRV 24 or over LRV 84. With 74 points between its strongest and weakest channel it holds a readable blue cast, so it will not flatten into a neutral once it is on four walls. Order by the code, not the name, and put a test patch on the wall before you commit — a screen cannot show you how this shade behaves in your own light.
Cook's Blue equivalents in other paint brands
The closest color to Farrow & Ball Cook's Blue from each brand we carry, measured with CIEDE2000 on the manufacturers' published color values. Below 1 the difference is practically invisible; below 2 you'd only notice it with the chips side by side. Screens and printed chips aren't paint, so compare real samples before you buy. In the Muro app you can put two of them on a photo of your own wall and look at them in your light.